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Paper/patches/server/0602-Add-Unix-domain-socket-support.patch
Jake Potrebic d8847bc1f3
Updated Upstream (Bukkit/CraftBukkit) (#9922) 
Upstream has released updates that appear to apply and compile correctly.
This update has not been tested by PaperMC and as with ANY update, please do your own testing

Bukkit Changes:
fde5602a PR-927: Add PlayerRecipeBookSettingsChangeEvent
949ff217 PR-930: Add methods to get/set evoker fang attack delay
f6f7c79d SPIGOT-7514, PR-929: Add "Enchantment Roll" API to enchant items according to Minecraft mechanics
d40e22da PR-712: Add API to get full result of crafting items

CraftBukkit Changes:
c8feb0629 PR-1291: Improve precondition message in Entity#playEffect
482c56a00 PR-1285: Add PlayerRecipeBookSettingsChangeEvent
cdf798800 PR-1290: Add methods to get/set evoker fang attack delay
2c1b5f78f SPIGOT-7514, PR-1289: Add "Enchantment Roll" API to enchant items according to Minecraft mechanics
6aa644ae9 PR-992: Add API to get full result of crafting items
ffb1319bc PR-1287: Fix scoreboards not updating in Player#setStatistic
2023-11-11 12:25:45 -08:00

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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Andrew Steinborn <git@steinborn.me>
Date: Tue, 11 May 2021 17:39:22 -0400
Subject: [PATCH] Add Unix domain socket support
For Windows and ARM support, JEP-380 is required:
https://inside.java/2021/02/03/jep380-unix-domain-sockets-channels/
This will be possible as of the Minecraft 1.17 Java version bump.
Tested-by: Mariell Hoversholm <proximyst@proximyst.com>
Reviewed-by: Mariell Hoversholm <proximyst@proximyst.com>
diff --git a/src/main/java/net/minecraft/server/dedicated/DedicatedServer.java b/src/main/java/net/minecraft/server/dedicated/DedicatedServer.java
index 3c751c98de1d5a9b41ebd832be0ae317d4ac9362..51c924f051c25cac8172b0ddab83f3b7a69adfe6 100644
--- a/src/main/java/net/minecraft/server/dedicated/DedicatedServer.java
+++ b/src/main/java/net/minecraft/server/dedicated/DedicatedServer.java
@@ -219,6 +219,20 @@ public class DedicatedServer extends MinecraftServer implements ServerInterface
this.setEnforceWhitelist(dedicatedserverproperties.enforceWhitelist);
// this.worldData.setGameType(dedicatedserverproperties.gamemode); // CraftBukkit - moved to world loading
DedicatedServer.LOGGER.info("Default game type: {}", dedicatedserverproperties.gamemode);
+ // Paper start - Unix domain socket support
+ java.net.SocketAddress bindAddress;
+ if (this.getLocalIp().startsWith("unix:")) {
+ if (!io.netty.channel.epoll.Epoll.isAvailable()) {
+ DedicatedServer.LOGGER.error("**** INVALID CONFIGURATION!");
+ DedicatedServer.LOGGER.error("You are trying to use a Unix domain socket but you're not on a supported OS.");
+ return false;
+ } else if (!io.papermc.paper.configuration.GlobalConfiguration.get().proxies.velocity.enabled && !org.spigotmc.SpigotConfig.bungee) {
+ DedicatedServer.LOGGER.error("**** INVALID CONFIGURATION!");
+ DedicatedServer.LOGGER.error("Unix domain sockets require IPs to be forwarded from a proxy.");
+ return false;
+ }
+ bindAddress = new io.netty.channel.unix.DomainSocketAddress(this.getLocalIp().substring("unix:".length()));
+ } else {
InetAddress inetaddress = null;
if (!this.getLocalIp().isEmpty()) {
@@ -228,12 +242,15 @@ public class DedicatedServer extends MinecraftServer implements ServerInterface
if (this.getPort() < 0) {
this.setPort(dedicatedserverproperties.serverPort);
}
+ bindAddress = new java.net.InetSocketAddress(inetaddress, this.getPort());
+ }
+ // Paper end
this.initializeKeyPair();
DedicatedServer.LOGGER.info("Starting Minecraft server on {}:{}", this.getLocalIp().isEmpty() ? "*" : this.getLocalIp(), this.getPort());
try {
- this.getConnection().startTcpServerListener(inetaddress, this.getPort());
+ this.getConnection().bind(bindAddress); // Paper - Unix domain socket support
} catch (IOException ioexception) {
DedicatedServer.LOGGER.warn("**** FAILED TO BIND TO PORT!");
DedicatedServer.LOGGER.warn("The exception was: {}", ioexception.toString());
diff --git a/src/main/java/net/minecraft/server/network/ServerConnectionListener.java b/src/main/java/net/minecraft/server/network/ServerConnectionListener.java
index 6641fd04821240b1bbeff1bd8d996a8f2fff8385..5f625acf04ddb56e3596d086252f9bfccfdb95f2 100644
--- a/src/main/java/net/minecraft/server/network/ServerConnectionListener.java
+++ b/src/main/java/net/minecraft/server/network/ServerConnectionListener.java
@@ -78,7 +78,12 @@ public class ServerConnectionListener {
this.running = true;
}
+ // Paper start
public void startTcpServerListener(@Nullable InetAddress address, int port) throws IOException {
+ bind(new java.net.InetSocketAddress(address, port));
+ }
+ public void bind(java.net.SocketAddress address) throws IOException {
+ // Paper end
List list = this.channels;
synchronized (this.channels) {
@@ -86,7 +91,13 @@ public class ServerConnectionListener {
EventLoopGroup eventloopgroup;
if (Epoll.isAvailable() && this.server.isEpollEnabled()) {
+ // Paper start
+ if (address instanceof io.netty.channel.unix.DomainSocketAddress) {
+ oclass = io.netty.channel.epoll.EpollServerDomainSocketChannel.class;
+ } else {
oclass = EpollServerSocketChannel.class;
+ }
+ // Paper end
eventloopgroup = (EventLoopGroup) ServerConnectionListener.SERVER_EPOLL_EVENT_GROUP.get();
ServerConnectionListener.LOGGER.info("Using epoll channel type");
} else {
@@ -118,7 +129,7 @@ public class ServerConnectionListener {
((Connection) object).setListenerForServerboundHandshake(new ServerHandshakePacketListenerImpl(ServerConnectionListener.this.server, (Connection) object));
io.papermc.paper.network.ChannelInitializeListenerHolder.callListeners(channel); // Paper
}
- }).group(eventloopgroup).localAddress(address, port)).option(ChannelOption.AUTO_READ, false).bind().syncUninterruptibly()); // CraftBukkit
+ }).group(eventloopgroup).localAddress(address)).option(ChannelOption.AUTO_READ, false).bind().syncUninterruptibly()); // CraftBukkit // Paper
}
}
diff --git a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
index e579a249e3d441458aa05ea99787b668fae78021..b35f4ab4ff034f7b59f3970fc18af2f777ec2a40 100644
--- a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
+++ b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
@@ -2461,6 +2461,11 @@ public class ServerGamePacketListenerImpl extends ServerCommonPacketListenerImpl
// Spigot Start
public SocketAddress getRawAddress()
{
+ // Paper start - this can be nullable in the case of a Unix domain socket, so if it is, fake something
+ if (connection.channel.remoteAddress() == null) {
+ return new java.net.InetSocketAddress(java.net.InetAddress.getLoopbackAddress(), 0);
+ }
+ // Paper end
return this.connection.channel.remoteAddress();
}
// Spigot End
diff --git a/src/main/java/net/minecraft/server/network/ServerHandshakePacketListenerImpl.java b/src/main/java/net/minecraft/server/network/ServerHandshakePacketListenerImpl.java
index bb8ba0ba5c70f321d4fd195f14cfb4d75ec0e42f..0b3d6b309ea653d44bcfcd6dd418f692e040c87b 100644
--- a/src/main/java/net/minecraft/server/network/ServerHandshakePacketListenerImpl.java
+++ b/src/main/java/net/minecraft/server/network/ServerHandshakePacketListenerImpl.java
@@ -45,6 +45,7 @@ public class ServerHandshakePacketListenerImpl implements ServerHandshakePacketL
this.connection.setClientboundProtocolAfterHandshake(ClientIntent.LOGIN);
// CraftBukkit start - Connection throttle
try {
+ if (!(this.connection.channel.localAddress() instanceof io.netty.channel.unix.DomainSocketAddress)) { // Paper - the connection throttle is useless when you have a Unix domain socket
long currentTime = System.currentTimeMillis();
long connectionThrottle = this.server.server.getConnectionThrottle();
InetAddress address = ((java.net.InetSocketAddress) this.connection.getRemoteAddress()).getAddress();
@@ -73,6 +74,7 @@ public class ServerHandshakePacketListenerImpl implements ServerHandshakePacketL
}
}
}
+ } // Paper - add closing bracket for if check above
} catch (Throwable t) {
org.apache.logging.log4j.LogManager.getLogger().debug("Failed to check connection throttle", t);
}
@@ -129,8 +131,11 @@ public class ServerHandshakePacketListenerImpl implements ServerHandshakePacketL
// Paper end
// if (org.spigotmc.SpigotConfig.bungee) { // Paper - comment out, we check above!
if ( ( split.length == 3 || split.length == 4 ) && ( ServerHandshakePacketListenerImpl.BYPASS_HOSTCHECK || ServerHandshakePacketListenerImpl.HOST_PATTERN.matcher( split[1] ).matches() ) ) { // Paper
+ // Paper start - Unix domain socket support
+ java.net.SocketAddress socketAddress = this.connection.getRemoteAddress();
this.connection.hostname = split[0];
- this.connection.address = new java.net.InetSocketAddress(split[1], ((java.net.InetSocketAddress) this.connection.getRemoteAddress()).getPort());
+ this.connection.address = new java.net.InetSocketAddress(split[1], socketAddress instanceof java.net.InetSocketAddress ? ((java.net.InetSocketAddress) socketAddress).getPort() : 0);
+ // Paper end
this.connection.spoofedUUID = com.mojang.util.UndashedUuid.fromStringLenient( split[2] );
} else
{
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